Immediately, I came across a nasty bug - the head went to the top of the screen and the computer's paddle followed it, and the head got stuck in the paddle - this happened multiple times.
It's an interesting rendition of Pong, and, aside form the bug, it could be really enjoyable. I think we'd like to see a little more content though - maybe you could select a head from a number of choices (maybe pay an homage to your favorite Newgrounds characters, with permission of course, by putting their heads in your game) or something like that.
I'll give you three stars because I would like to keep it around, but for your next title, just take a chance! Maybe make a rendition of an old game you love and put your own spin, not on just the image, but also the actual gameplay itself. That would be real neat.